package StringBuilder;

public class StringBuilderTest1 {
    public static void main(String[] agrs){
        int[] arr = {1,2,3};
        String s = arrayToString(arr);
        System.out.println("s:" + s);
    }
    
    public static String arrayToString(int[] arr){
        StringBuilder sb = new StringBuilder();

        sb.append("[");

        for (int i = 0; i < arr.length; i++) {
            if (i == arr.length - 1) {
                sb.append(arr[i]);
            } else {
                sb.append(arr[i]).append(",");
            }
        }
        sb.append("]");
        String s = sb.toString();
        return s;
    }
}

